The B5 Systems M-LOK Carbine-Length Handguard (brand part number HMC-1357) is a two-piece, drop-in handguard built for AR-15 rifles running a carbine-length gas system. B5 Systems builds the handguard from durable composite material with a built-in stamped aluminum heat shield, so it manages heat from sustained fire without the weight or cost of a full aluminum free-float rail. M-LOK slots run the length of the handguard for mounting lights, foregrips, and other accessories, and the two-piece design fits both round and triangle handguard caps for broad compatibility across AR-15 builds.

Key Specifications

• Carbine-Length Sizing matches carbine-length gas system AR-15 builds.
• Two-Piece Design installs as a standard drop-in handguard without a barrel nut change.
• Durable Composite Construction keeps weight down while resisting cracking and wear.
• Built-In Aluminum Heat Shield protects the composite shell and your support hand from barrel heat.
• M-LOK Mounting Slots run the length of the handguard for lights, grips, and rail accessories.
• Fits Round and Triangle Caps for compatibility with both common AR-15 handguard cap styles.
• Black Finish matches most factory and aftermarket AR-15 builds.

Frequently Asked Questions

Does this fit rifle-length gas systems? No, it’s sized specifically for carbine-length gas systems.

Does it have a heat shield? Yes, a built-in stamped aluminum heat shield is molded into the composite shell.

What accessories can I mount on it? Any standard M-LOK accessory, such as lights, foregrips, or rail sections.

Buy the B5 Systems M-LOK Carbine-Length Handguard, Two-Piece Black

Upgrade your carbine-length AR-15 with a B5 Systems M-LOK handguard from our AR handguards selection. Order online and we’ll ship it straight to your door from our Lubbock, Texas gun shop.